CN110239279B

CN110239279B - Caster wheel

Info

Publication number: CN110239279B
Application number: CN201810185382.8A
Authority: CN
Inventors: 卓安寗
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-03-07
Filing date: 2018-03-07
Publication date: 2022-08-26
Anticipated expiration: 2038-03-07
Also published as: CN110239279A

Abstract

The invention provides a caster which comprises a body, a control assembly, a brake sliding block, a limiting piece and a directional piece. The body defines an axial direction and comprises a pin and a wheel seat, the wheel seat is pivoted to the pin along the axial direction, and at least one wheel body is pivoted to the wheel seat. The control assembly comprises a cam and a braking piece, the braking piece is arranged on the body in a sliding mode along the axial direction and cannot rotate relative to the connecting pin, a first tooth portion and at least one groove are formed in the braking piece along the axial direction, the braking piece is normally propped against the cam by a first elastic piece, and the braking piece is provided with protrusions matched with the first convex portion, the second convex portion and the third convex portion. The caster wheel can be rapidly switched to three states of directional sliding, braking, free sliding and the like so as to be adjusted according to the use condition, and has simple structure and convenient operation.

Description

Caster wheel

Technical Field

The invention relates to a caster.

Background

Generally, a caster with braking function is composed of a body and a wheel body pivoted to the body, a braking unit is arranged between the body and the wheel body, the braking unit is a metal plate which can be pushed to press the wheel body, in addition, one end of the body is pivoted with a pin, the foot can be used to connect the caster to the bottom of the supported frame, when the frame is to be displaced, the body can effectively drive the wheel body to rotate in multiple directions by pivoting the pin and the body, so as to smoothly move the frame, and when an operator moves the frame to a preset position, the braking unit can be pressed on the wheel body to prevent the wheel body from rolling, so as to achieve the braking effect. The caster disclosed in taiwan patent No. TWM298527 belongs to this category.

However, although the caster wheels can prevent the wheel body from rolling, since the pins and the body are still in a state of being capable of pivoting with each other, when the frame is pushed by an external force, the frame and the pins rotate around a contact point of the wheel body and the ground, which still causes the frame and the pins to displace relative to the ground, and thus the article placed on the frame is easily shaken or even falls off, which has the disadvantage of requiring improvement.

Therefore, there is a need for a new and improved caster that solves the above problems.

Disclosure of Invention

The main objective of the present invention is to provide a caster capable of being rapidly switched between three states, namely, a directional sliding state, a braking state, and a free sliding state, so as to be adjusted according to a use condition, and the caster has a simple structure and is convenient to operate.

In order to achieve the purpose, the invention adopts the following technical scheme:

a caster comprises a body, a control component, a brake sliding block, a limiting component and a directional component. The body defines an axial direction and comprises a pin and a wheel seat, the wheel seat is pivoted to the pin along the axial direction, and at least one wheel body is pivoted to the wheel seat. The control assembly comprises a cam and a braking part, wherein the cam is radially provided with a first convex part, a second convex part and a third convex part, the radial size of the first convex part is smaller than that of the second convex part, the radial size of the second convex part is smaller than that of the third convex part, the cam is pivoted on the body and can rotate at a directional position, a movable position and a locking position, the braking part is arranged on the body in a sliding mode along the axial direction and cannot rotate relative to the pin, the braking part is provided with a first tooth part and at least one groove along the axial direction, a first elastic part enables the braking part to normally abut against the cam, and the braking part is provided with bulges matched with the first convex part, the second convex part and the third convex part. The brake sliding block is arranged at one end of the brake piece, which is far away from the cam, and the brake piece and the brake sliding block slide together. The limiting member is assembled on the wheel seat and provided with a plurality of jacks along the axial direction. The orientation component is assembled on the wheel seat and is provided with a clamping convex. When the cam rotates to the oriented position, the braking part abuts against the first convex part, the clamping convex part of the oriented part is inserted into the groove, and the pin cannot rotate relative to the wheel seat; when the cam rotates to the movable position, the braking part abuts against the second convex part and the clamping convex part of the directional part is separated from the groove, and the pin can rotate relative to the wheel seat; when the cam rotates to the locking position, the braking member abuts against the third protruding portion, the first tooth portion is inserted into the plurality of insertion holes, the braking member drives the braking slider to abut against at least one wheel body, and the pin cannot rotate relative to the wheel seat and at least one wheel body cannot rotate.

Further, in the above-mentioned case,

the limiting part comprises an assembling section, a bending section and a limiting section, the assembling section is assembled with the wheel seat, the limiting section is provided with the plurality of jacks in a penetrating mode, and the braking part is located on one side, facing the cam, of the limiting section.

The first tooth part is in a ring tooth shape, a plurality of tooth parts of the first tooth part extend towards the direction of the at least one wheel body along the axial direction, and the plurality of insertion holes are arranged in a radial and oblique mode.

The limiting member is an elastic flexible sheet, and when the first tooth portion abuts against the limiting section, the bending section and the limiting section can be restored to be pushed by the first tooth portion to swing towards the direction of the at least one wheel body.

The wheel seat comprises a top plate and two side plates arranged at two ends of the top plate, the at least one wheel body is pivoted between the two side plates, one end of the directional piece and the assembling section are assembled on one side of the top plate facing the at least one wheel body in an overlapping mode, and the positioning piece is located between the top plate and the assembling section.

The braking part is radially provided with a disc body, the at least one groove is radially and concavely arranged on the disc body, and the first tooth part is annularly arranged on the disc body.

The wheel seat is provided with an annular wall, a bearing is arranged in the annular wall, and the pins are inserted in the inner peripheral wall of the bearing.

The brake slide block is provided with a brake cambered surface, the curvature of the brake cambered surface corresponds to the outer peripheral surface of the at least one wheel body, and the brake part is a non-circular cylinder.

The wheel seat comprises a top plate and two side plates arranged at two ends of the top plate, the at least one wheel body is pivoted between the two side plates, one end of the directional piece and the assembling section are assembled on one side of the top plate facing the at least one wheel body in an overlapping mode, and the positioning piece is positioned between the top plate and the assembling section; the braking part is radially provided with a disc body, the at least one groove is radially recessed in the disc body, and the first tooth part is annularly arranged on the disc body; the wheel seat is provided with an annular wall, a bearing is arranged in the annular wall, and the pins are inserted into the inner peripheral wall of the bearing; the brake slide block is provided with a brake cambered surface, the curvature of the brake cambered surface corresponds to the outer peripheral surface of the at least one wheel body, and the brake part is a non-circular cylinder.

The brake block is provided with a convex column at one end facing the at least one wheel body, the convex column is provided with an annular groove, the convex column is sleeved with the brake slider, a fastener is buckled in the annular groove to limit the brake slider between the convex column and the disk body and between the fastener and the convex column, the brake slider and the convex column are provided with a slidable gap, two ends of the brake slider facing the two side plates are respectively provided with a propping convex part, and the two propping convex parts are respectively propped between the two side plates.

The invention has the advantages that:

the caster wheel can be rapidly switched to three states of directional sliding, braking, free sliding and the like so as to be adjusted according to the use condition, and has simple structure and convenient operation.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

Fig. 3 is another exploded view of a preferred embodiment of the present invention.

FIG. 4 is a partial schematic view of a preferred embodiment of the present invention.

Fig. 5 to 7 are operation sectional views of a preferred embodiment of the present invention.

Fig. 8 is a schematic view illustrating the first tooth portion inserted into the plurality of insertion holes according to the present invention.

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the invention.

Referring to fig. 1 to 5, which illustrate a preferred embodiment of the present invention, the caster of the present invention includes a main body 1, a control assembly 2, a brake block 3, a limiting member 4 and a direction member 5.

The body 1 defines an axial direction 11, and includes a pin 12 and a wheel seat 13, the wheel seat 13 is pivotally connected to the pin 12 along the axial direction 11, at least one wheel 14 is pivotally connected to the wheel seat 13, in this embodiment, the wheel seat 13 is pivotally provided with two wheel bodies 14, and the pin 12 can be further assembled to a frame (such as an eagle frame or a trolley, not shown) for fast moving the frame.

The control assembly 2 includes a cam 21 and a braking member 22, the cam 21 is provided with a first protrusion 211, a second protrusion 212 and a third protrusion 213 in a radial direction, the radial dimension of the first protrusion 211 is smaller than the radial dimension of the second protrusion 212, the radial dimension of the second protrusion 212 is smaller than the radial dimension of the third protrusion 213, the cam 21 is pivoted to the body 1 and can rotate at a positioning position, a moving position and a locking position, the braking member 22 is slidably disposed on the body 1 along the axial direction 11 and cannot rotate relative to the leg 12, the braking member 22 is provided with a first tooth portion 23 and at least one groove 24 along the axial direction 11, in this embodiment, the braking member 22 is provided with two grooves 24, a first elastic member 25 normally urges the braking member 22 towards the direction of the cam 21, the braking member has protrusions matched with the first protrusion, the second protrusion and the third protrusion, the braking member 22 is urged between the first protrusion 211 and the third protrusion 213 by rotating the cam 21, the brake member 22 can be controlled to slide relative to the body 1.

The brake sliding block 3 is arranged at one end of the brake part 22 far away from the cam 21, and the brake part 22 and the brake sliding block 3 slide together. Preferably, the braking slider 3 is provided with a braking arc surface 31, the curvature of the braking arc surface 31 corresponds to the outer peripheral surfaces of the two wheel bodies 14 to have a better braking effect, and the braking member 22 is a non-circular cylinder, so that the braking member 22 cannot rotate relative to the foot 12.

The limiting member 4 is assembled to the wheel base 13 and has a plurality of insertion holes 41 formed along the axial direction 11.

The directional member 5 is assembled to the wheel base 13 and is provided with a locking protrusion 51.

Referring to fig. 5 to 8, when the cam 21 rotates to the oriented position (as shown in fig. 5), the braking member 22 abuts against the first protrusion 211, and the locking protrusion 51 of the oriented member 5 is inserted into a groove 24, so that the pin 12 cannot rotate relative to the wheel base 13, and can only be used for moving the rack body linearly and cannot turn; when the cam 21 rotates to the active position (as shown in fig. 6), the braking member 22 abuts against the second protrusion 212 and the locking protrusion 51 of the directional member 5 is disengaged from the groove 24, so that the pin 12 can rotate relative to the wheel base 13, and the frame body can be freely moved and turned; when the cam 21 rotates to the locking position (as shown in fig. 7), the braking member 22 abuts against the third protrusion 213, the first tooth portion 23 is inserted into the plurality of insertion holes 41, and the braking member 22 drives the braking slider 3 to abut against the two wheel bodies 14, so that the pin 12 cannot rotate relative to the wheel seat 13 and the two wheel bodies 14 cannot rotate, thereby preventing the wheel seat 13 and the pin 12 from rotating relative to each other and the frame from moving relative to the ground when the frame is pushed by an external force when the two wheel bodies 14 do not rotate. Therefore, the caster can control the rotation of the two caster bodies 14 and the rotation relationship between the pins 12 and the caster seats 13 by rotating the cam 21 to the oriented position, the movable position and the locking position, so as to achieve the purpose of practical use.

Specifically, the limiting member 4 includes an assembling section 42, a bending section 43 and a limiting section 44, the assembling section 42 is assembled with the wheel seat 13, the limiting section 44 is provided with a plurality of insertion holes 41, and the braking member 22 is located on one side of the limiting section 44 facing the cam 21.

Further, in the embodiment, the first tooth portion 23 is in a ring tooth shape, the plurality of teeth 231 of the first tooth portion 23 extend in the axial direction 11 toward the two wheel bodies 14, and the plurality of insertion holes 41 are arranged in a radial and oblique manner to match the shape of the first tooth portion 23, so that the first tooth portion 23 is easily inserted into the plurality of insertion holes 41. Preferably, the position-limiting member 4 is an elastic flexible sheet, when the first tooth portion 23 abuts against the position-limiting section 44, the bending section 43 and the position-limiting section 44 can be pushed and swung by the first tooth portion 23 in a restoring manner toward the two wheel bodies 14, in detail, when part of the plurality of tooth members 231 of the first tooth portion 23 are not accurately aligned with the plurality of insertion holes 41 and only abut against the position-limiting section 44, the position-limiting section 44 and the bending section 43 swing toward the two wheel bodies 14 and the plurality of insertion holes 41 are arranged in a radial and oblique manner (as shown in fig. 8), so that the plurality of insertion holes 41 can be shifted to align with part of the tooth members 231 of the first tooth portion 23, and the plurality of insertion holes 41 can be smoothly inserted, and therefore, the first tooth portion 23 can be smoothly inserted into the plurality of insertion holes 41 without accurately aligning the first tooth portion 23 with the plurality of insertion holes 41, thereby improving the operation convenience.

In the embodiment, the wheel seat 13 includes a top plate 132 and two side plates 133 disposed at two ends of the top plate 132, the two wheel bodies 14 are pivotally disposed between the two side plates 133, one end of the positioning element 5 and the assembling section 42 are assembled on one side of the top plate 132 facing the two wheel bodies 14 in an overlapping manner, and the positioning element is located between the top plate 132 and the assembling section 42.

The braking member 22 is provided with a disc 26 in a radial direction, the two grooves 24 are radially recessed in the disc 26, and the first tooth portion 23 is annularly provided on the disc 26, so that the locking protrusion 51 can be smoothly locked in one of the grooves 24. In addition, the wheel base 13 is provided with a circular wall 131, a baclin 16 is arranged in the circular wall 131, and the pins 12 are inserted into the inner peripheral wall of the baclin 16, so that the pins 12 can smoothly rotate relative to the wheel base 13.

It should be noted that, as shown in fig. 2 and 3, in this embodiment, one end of the braking member 22 facing the two wheel bodies 14 is provided with a protruding column 27, the protruding column 27 is provided with a ring groove 271, the braking slider 3 is sleeved on the protruding column 27, a fastener 28 is fastened in the ring groove 271 to limit the braking slider 3 between the protruding column 27 and the wheel bodies 26, the fastener 28, in addition, two ends of the braking slider 3 facing the two side plates 133 are respectively provided with a propping protrusion 32, the two propping protrusions 32 prop between the two side plates 133, the two side plates 133 can limit the braking slider 3 to prevent the braking slider from rotating relative to the protruding column 27, so that the braking arc 31 of the braking slider 3 always faces the two wheel bodies 14, preferably, the fastener 28 is a C-type fastener to facilitate the assembly and disassembly, and the braking slider 3 has a slidable gap with the protruding column 27, when the braking arc 31 of the braking slider 3 props against the two wheel bodies 14, the braking slider 3 can slightly slide relative to enable the braking arc 31 of the wheel bodies 27 to contact with the wheel bodies To abut against the two wheel bodies 14 for achieving the best braking effect.

In summary, the caster of the present invention can control the rotation of the two caster bodies and the rotation relationship between the pins and the caster seat by rotating the cam at the orientation position, the movable position and the locking position, so as to achieve the practical purpose. In addition, the limiting section and the bending section swing towards the direction of the two wheel bodies, and the plurality of jacks are arranged in a radial and oblique mode, so that the plurality of jacks can be deviated to align with part of the tooth pieces positioned on the first tooth part, the plurality of jacks can be smoothly inserted, the first tooth part can be smoothly inserted into the plurality of jacks without accurately aligning the first tooth part with the plurality of jacks, and the operation convenience is improved.

The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A caster, comprising:

a body defining an axial direction and including a pin and a wheel seat, the wheel seat is pivoted to the pin along the axial direction, and at least one wheel body is pivoted to the wheel seat;

a control assembly, including a cam and a brake member, the cam is provided with a first convex part, a second convex part and a third convex part in radial direction, the radial dimension of the first convex part is smaller than that of the second convex part, the radial dimension of the second convex part is smaller than that of the third convex part, the cam is pivoted on the body and can rotate at a directional position, a movable position and a locking position, the brake member is arranged on the body in a sliding way along the axial direction and can not rotate relative to the pin, the brake member is provided with a first tooth part and at least one groove along the axial direction, a first elastic part normally springs the brake member towards the direction of the cam, and the brake member is provided with a bulge matched with the first convex part, the second convex part and the third convex part;

the brake sliding block is arranged at one end of the brake part, which is far away from the cam, and the brake part and the brake sliding block jointly slide;

a limiting member assembled to the wheel seat and having a plurality of insertion holes passing through along the axial direction;

a directional piece assembled on the wheel seat and provided with a clamping convex;

when the cam rotates to the oriented position, the braking part abuts against the first convex part, the clamping convex part of the oriented part is inserted into a groove, and the pin cannot rotate relative to the wheel seat; when the cam rotates to the movable position, the braking part abuts against the second convex part and the clamping convex part of the directional part is separated from the groove, and the pin can rotate relative to the wheel seat; when the cam rotates to the locking position, the braking member abuts against the third protruding portion, the first tooth portion is inserted into the plurality of insertion holes, the braking member drives the braking slider to abut against at least one wheel body, the pin cannot rotate relative to the wheel seat, and at least one wheel body cannot rotate.

2. The caster as claimed in claim 1, wherein the stopper comprises a connecting segment, a bending segment and a stopper segment, the connecting segment is connected to the wheel seat, the stopper segment has the plurality of insertion holes, and the stopper is located on a side of the stopper segment facing the cam.

3. The caster wheel according to claim 2, wherein the first tooth portion is in the shape of a ring tooth, the teeth of the first tooth portion extend in the axial direction toward the at least one wheel body, and the insertion holes are arranged in a radially oblique manner.

4. The caster of claim 3, wherein the limiting member is a flexible elastic sheet, and when the first tooth portion abuts against the limiting segment, the bending segment and the limiting segment are pushed by the first tooth portion to swing in the direction of the at least one wheel body.

5. The caster as claimed in claim 2, wherein the wheel seat comprises a top plate and two side plates disposed at two ends of the top plate, the at least one wheel body is pivotally disposed between the two side plates, one end of the orientation member and the assembling section are assembled to the top plate at a side facing the at least one wheel body in an overlapping manner, and the orientation member is disposed between the top plate and the assembling section.

6. The caster of claim 1, wherein said brake member is radially disposed with a disk, said at least one groove is radially recessed with respect to said disk, and said first tooth is circumferentially disposed with respect to said disk.

7. The caster as claimed in claim 1, wherein said wheel seat has a circumferential wall, a peyline is disposed in said circumferential wall, and said pins are inserted into an inner circumferential wall of said peyline.

8. The caster of claim 1, wherein said brake shoe has a brake arcuate surface having a curvature corresponding to an outer circumferential surface of said at least one wheel body, and said braking member is a non-circular cylinder.

9. The caster as claimed in claim 4, wherein the wheel seat comprises a top plate and two side plates disposed at two ends of the top plate, the at least one wheel body is pivotally disposed between the two side plates, one end of the orientation member and the assembling section are assembled to the side of the top plate facing the at least one wheel body in an overlapping manner, and the orientation member is disposed between the top plate and the assembling section; the braking part is radially provided with a disc body, the at least one groove is radially recessed in the disc body, and the first tooth part is annularly arranged on the disc body; the wheel seat is provided with an annular wall, a bearing is arranged in the annular wall, and the pins are inserted into the inner peripheral wall of the bearing; the brake slide block is provided with a brake cambered surface, the curvature of the brake cambered surface corresponds to the outer peripheral surface of the at least one wheel body, and the brake part is a non-circular cylinder.

10. The caster as claimed in claim 9, wherein the braking member has a protruding post at an end facing the at least one wheel body, the protruding post has a circular groove, the braking slider is disposed on the protruding post, a fastener is fastened in the circular groove to limit the braking slider between the protruding post and the disk body, the fastener, and the braking slider and the protruding post have a slidable gap, the two ends of the braking slider facing the two side plates have a supporting protrusion respectively, and the two supporting protrusions are respectively supported between the two side plates.